优生学具有生物学上的意义.Eugenics has a biological significance.对 “ 积极 ” 优生学和 “ 消极 ” 优生学往往加以区分.A distinction is often made between " positive " and " negative " eugenics.消极优生学的范例是试图破坏一种对人体有害的隐性基因.An example of negative eugenics woul...
She offered Molly tidbits: a chicken drumstick, some cheese.她给了莫莉一些吃的：一根鸡腿下段和一些奶酪。He fell asleep clutching a half - eaten drumstick in his right fist.他右手里紧握着一只吃了一半的鸡腿睡着了.Bill gestured with the drumstick in one hand and t...
1818年菲涅耳参加了法国科学院主办的一次竞赛.In 1818 Fresnel entered a competition sponsored by French Academy.菲涅耳通过加进来干涉概念,解决了这个困难.The difficulty was resolved by Fresnel with his addition of the concept of interference.在许多情况下, 对于我们的目的来说,更简单...
That can be liquidated at market value any time.那可按市价随时得到偿付.Roti liquidated all the assets he could, turned in his own last dollar.罗迪把他所有的资产换了现款, 垫尽了自己的钱.If we had defaulted on our loans, the Loan Guarantee Board could h...